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NikAS [45]
4 years ago
9

I dont think i did this right what do u guys think

Mathematics
2 answers:
natta225 [31]4 years ago
8 0

Answer:

yes........ correct

Step-by-step explanation:

Although, the method that i tried to justfy is not the same as yours, I got the same final answer. so, what you wrote is right.

vaieri [72.5K]4 years ago
7 0

Answer:

see below

Step-by-step explanation:

To find the percent increase, take the new amount and subtract the original amount

25-20 = 5

Divide by the original amount

5/20 = .25

The increase is 25%

100% + 25% = 125%

The new amount is 125% of the old amount

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Which equation represents a population of 250 animals that decreases at an annual rate of 21%
guajiro [1.7K]

Answer:

y= 250( 1-0.21)^x

Step-by-step explanation:

This represents exponential decay

6 0
4 years ago
Robbie wants to buy his friend a new phone for his birthday, Robbie’s job at the mall pays about $54 and an extra $1.50 per item
poizon [28]

He'd have to sell 268 items

268x $1.50 = 402

$402 + $54 = $456


7 0
4 years ago
The sum of Pete's and Sam's ages is 30. Five years ago, Pete was 3 times as old as Sam. How old is Sam?
RUDIKE [14]
P-5=3s-15 because Pete is 20 and Sam is 10. 20-5= 15 and 3(10)-15 also equals 15. The answer is C.
4 0
4 years ago
Read 2 more answers
I need help with this word problem.
Rainbow [258]

Answer:

$3.22 per square feet

Step-by-step explanation:

To solve, I usually set up an equation:

<u>sq ft</u>  = <u>12 1/2</u> = <u> 1 </u>

 $        40.21     x

Then, use cross multiplication.

(12 1/2)x=40.21

Divide both sides by 12 1/2 or 12.5

x = 3.2168

Round to the hundredths place [because we're dealing with money]

$3.22

I hope this helps!

8 0
3 years ago
Read 2 more answers
Find the midpoint of CD if c= (9,2) d= (-7,-9)
Mrrafil [7]

To find the midpoint of a segment you need to use this equation:

(x1+x2/2, y1+y2/2) so if you plug in the numbers its...

9+(-7)/2, 2+(-9)/2

then solve to find x and y coordinate

x= 1 and y= -3.5

so the midpoint of CD is (1,-3.5)

7 0
3 years ago
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